She put her hands on him so he put his back on her. I don't see why everyone is so upset. He had to stop the threat of her attacking him. I don't see a problem here. He should not be vilified
If a 12-13 year old kid in school is upset and starts flailing at a male teacher, would it be ok for that grown man to swing back and break the jaw of that kid?
If a driver on the road cut in front of you, slightly dinging your car, which prompted you purposely react by slamming your car into his, seriously injuring him and putting him in the hospital.....is that ok?
In any situation, you have to look at immediate bodily risk vs justifiable reaction. It's not different than saying it's NOT justifiable to shoot a man yelling he's going to kill you 50 feet away outside at your mailbox, but IS justifiable to shoot that same man if he's yelling the same thing while trying to break down your front door.
Mixon is a complete loser to follow a drunk girl into a place and laying her out like that. He knew the situation he was putting himself in and seemingly felt no remorse after how he casually walked away, not caring about her health. He didn't try to restrain her first and only swing if the situation continued to escalate. He swung from the word "go" in his head.